patchari raksawong in bangkok has the story. >>> president obama will visit thailand, myanmar, and cambodia on his first overseas trip since winning re-election earlier this month. myanmar is the destination that's making some observers unhappen pip. human rights say it's just too soon and the country's small steps towards democracy don't yet deserve a visit from the president of the united states. obama's national security adviser tom donilon defended the trip. he says it will advance the cause of reform in myanmar. >> the president's visit this time reflects his conviction that engagement is the best way to encourage burmese authorities to further action. >> human rights groups oppose the visit. they say the former pariah state has not achieved true democratic reform and ethnic minorities continue to face persecution. obama will meet his counterpart thein sein. donilon stressed obama will raise the issue of violence with myanmar's leaders. a week of violence last month claimed about 90 lives according to the official account. more than 100,000 people have been displaced. the white house s